//
// Copyright 2020-2022 Signal Messenger, LLC.
// SPDX-License-Identifier: AGPL-3.0-only
//

import SignalFfi
import Foundation

public class SignedPreKeyRecord: ClonableHandleOwner {
    internal override class func destroyNativeHandle(_ handle: OpaquePointer) -> SignalFfiErrorRef? {
        return signal_signed_pre_key_record_destroy(handle)
    }

    internal override class func cloneNativeHandle(_ newHandle: inout OpaquePointer?, currentHandle: OpaquePointer?) -> SignalFfiErrorRef? {
        return signal_signed_pre_key_record_clone(&newHandle, currentHandle)
    }

    public convenience init<Bytes: ContiguousBytes>(bytes: Bytes) throws {
        let handle: OpaquePointer? = try bytes.withUnsafeBorrowedBuffer {
            var result: OpaquePointer?
            try checkError(signal_signed_pre_key_record_deserialize(&result, $0))
            return result
        }
        self.init(owned: handle!)
    }

    public convenience init<Bytes: ContiguousBytes>(id: UInt32,
                                                    timestamp: UInt64,
                                                    privateKey: PrivateKey,
                                                    signature: Bytes) throws {
        let publicKey = privateKey.publicKey
        var result: OpaquePointer?
        try withNativeHandles(publicKey, privateKey) { publicKeyHandle, privateKeyHandle in
            try signature.withUnsafeBorrowedBuffer {
                try checkError(signal_signed_pre_key_record_new(&result, id, timestamp,
                                                                publicKeyHandle, privateKeyHandle,
                                                                $0))
            }
        }
        self.init(owned: result!)
    }

    public func serialize() -> [UInt8] {
        return withNativeHandle { nativeHandle in
            failOnError {
                try invokeFnReturningArray {
                    signal_signed_pre_key_record_serialize($0, nativeHandle)
                }
            }
        }
    }

    public var id: UInt32 {
        return withNativeHandle { nativeHandle in
            failOnError {
                try invokeFnReturningInteger {
                    signal_signed_pre_key_record_get_id($0, nativeHandle)
                }
            }
        }
    }

    public var timestamp: UInt64 {
        return withNativeHandle { nativeHandle in
            failOnError {
                try invokeFnReturningInteger {
                    signal_signed_pre_key_record_get_timestamp($0, nativeHandle)
                }
            }
        }
    }

    public var publicKey: PublicKey {
        return withNativeHandle { nativeHandle in
            failOnError {
                try invokeFnReturningNativeHandle {
                    signal_signed_pre_key_record_get_public_key($0, nativeHandle)
                }
            }
        }
    }

    public var privateKey: PrivateKey {
        return withNativeHandle { nativeHandle in
            failOnError {
                try invokeFnReturningNativeHandle {
                    signal_signed_pre_key_record_get_private_key($0, nativeHandle)
                }
            }
        }
    }

    public var signature: [UInt8] {
        return withNativeHandle { nativeHandle in
            failOnError {
                try invokeFnReturningArray {
                    signal_signed_pre_key_record_get_signature($0, nativeHandle)
                }
            }
        }
    }
}